Time interval of earthquake recurrence for strike - slip fault |
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Authors: | Shande Pan and Jin Ma |
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Affiliation: | (1) Institute of Geology, State Seismological Bureau, 100029 Beijing, China |
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Abstract: | On the basis of fault’s dynamic model of Knopoffet al. (1973), this paper has finally obtained a simple approximate formula to be able to estimate the recurrence time intervalT R of earthquake on strike-slip fault. Preliminary result holds thatμ andδ s — δ f have not much effect onT R . Leta is the ratio of the coseismic displacementD s to the total displacementD t in whole event course, i.e.,a =D s /D t , thena = 1/3 may represent the standard theoretical state in whichT R is independent onμ andδ s — δ f . At this time,T R is the arithmetic average ofs 0/v andkd/β, wheres 0 is the long-term preseismic accumulated slippage,v is fault’s average displacement rate,d is the fracture length on the fault of seismic focal region andβ is shear wave velocity. In addition,k =υ 0/aυ, whereυ 0 is the initial fracture velocity of actual structure at the coseismic instant. The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 187–194, 1992. This paper is a part of contracted item of State Seismological Bureau — Tectonic Physical Study of Earthquake Recurrence Period and Characteristic Magnitude. |
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Keywords: | earthquake recurrence strike-slip fault recurrence time interval |
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